Crown Castle International Corp. is a real estate investment trust company, which engages in the provision of access to wireless infrastructure via long-term contacts. It operates through the following segments: Towers, Small Cells, and Other. The Towers segment offers access, including space or capacity towers dispersed throughout the U.S. The Small Cells segment covers access, including space or capacity of fiber primarily supporting small cell networks. The company was founded by Ted B. Miller Jr. and Edward C. Hutcheson Jr. in 1994 and is headquartered in Houston, TX.